diff options
author | Benoit Jacob <jacob.benoit.1@gmail.com> | 2008-07-09 16:43:11 +0000 |
---|---|---|
committer | Benoit Jacob <jacob.benoit.1@gmail.com> | 2008-07-09 16:43:11 +0000 |
commit | 8f21a5e8621d25080b9ccc1f2b6765f8bc49af0f (patch) | |
tree | d8d4821214b0bef00eeb564f636a39aebc900526 | |
parent | 28539e7597c643dbc2b8d4f49dd16bd86fb7251f (diff) |
add benchmark for slice vectorization... expected it to be little or
zero benefit... turns out to be 20x speedup. Something is wrong.
-rw-r--r-- | bench/benchmarkSlice.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/bench/benchmarkSlice.cpp b/bench/benchmarkSlice.cpp new file mode 100644 index 000000000..197fe2488 --- /dev/null +++ b/bench/benchmarkSlice.cpp @@ -0,0 +1,35 @@ +// g++ -O3 -DNDEBUG benchmarkX.cpp -o benchmarkX && time ./benchmarkX + +#include <Eigen/Array> + +using namespace std; +USING_PART_OF_NAMESPACE_EIGEN + +#ifndef REPEAT +#define REPEAT 10000 +#endif + +#ifndef SCALAR +#define SCALAR float +#endif + +int main(int argc, char *argv[]) +{ + typedef Matrix<SCALAR, Eigen::Dynamic, Eigen::Dynamic> Mat; + Mat m(100, 100); + m.setRandom(); + + for(int a = 0; a < REPEAT; a++) + { + int r, c, nr, nc; + r = Eigen::ei_random<int>(0,10); + c = Eigen::ei_random<int>(0,10); + nr = Eigen::ei_random<int>(50,80); + nc = Eigen::ei_random<int>(50,80); + m.block(r,c,nr,nc) += Mat::ones(nr,nc); + m.block(r,c,nr,nc) *= SCALAR(10); + m.block(r,c,nr,nc) -= Mat::constant(nr,nc,10); + } + cout << m[0] << endl; + return 0; +} |